Canon 400D vs Pentax Q
The Canon EOS 400D (called Canon XTi in some regions) and the Pentax Q are two digital cameras that were officially introduced, respectively, in August 2006 and June 2011. The 400D is a DSLR, while the Pentax Q is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (400D) and a 1/2.3-inch (Pentax Q) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Pentax provides 12 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 400D||Pentax Q|
|Digital single lens reflex||Mirrorless system camera|
|Canon EF mount lenses||Pentax Q mount lenses|
|10.1 MP, APS-C Sensor||12 MP, 1/2.3" Sensor|
|no Video||1080/30p Video|
|ISO 100-1600||ISO 125-6400|
|Optical viewfinder||Viewfinder optional|
|2.5" LCD, 230k dots||3.0" LCD, 460k dots|
|Fixed screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|3 shutter flaps per second||1.5 shutter flaps per second|
|Lens stabilization only||In-body stabilization|
|370 shots per battery charge||230 shots per battery charge|
|127 x 84 x 65 mm, 556 g||98 x 57 x 31 mm, 180 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 400D and the Pentax Q? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
An illustration of the physical size and weight of the Canon 400D and the Pentax Q is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter.
The Pentax Q can be obtained in two different colors (black, white), while the 400D is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax Q is considerably smaller (48 percent) than the Canon 400D. Moreover, the Pentax Q is substantially lighter (68 percent) than the 400D. In this context, it is worth noting that neither the 400D nor the Pentax Q are weather-sealed.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Canon 400D»||5.0 in||3.3 in||2.6 in||19.6 oz||370||n||Aug 2006||799||Canon 400D|
|Pentax Q«||3.9 in||2.2 in||1.2 in||6.3 oz||230||n||Jun 2011||649||Pentax Q|
|Canon 750D« »||5.2 in||4.0 in||3.1 in||19.6 oz||440||n||Feb 2015||749||Canon 750D|
|Canon 760D« »||5.2 in||4.0 in||3.1 in||19.9 oz||440||n||Feb 2015||649||Canon 760D|
|Canon 650D« »||5.2 in||3.9 in||3.1 in||20.3 oz||440||n||Jun 2012||849||Canon 650D|
|Canon 1100D« »||5.1 in||3.9 in||3.1 in||17.5 oz||700||n||Feb 2011||449||Canon 1100D|
|Canon 550D« »||5.1 in||3.9 in||2.4 in||18.7 oz||440||n||Feb 2010||699||Canon 550D|
|Canon 500D« »||5.1 in||3.9 in||2.4 in||18.3 oz||400||n||Mar 2009||799||Canon 500D|
|Canon 450D« »||5.1 in||3.9 in||2.4 in||18.5 oz||500||n||Jan 2008||799||Canon 450D|
|Canon 40D« »||5.7 in||4.3 in||2.9 in||29.0 oz||750||n||Aug 2007||1,299||Canon 40D|
|Canon 350D« »||5.0 in||3.7 in||2.5 in||19.0 oz||400||n||Feb 2005||899||Canon 350D|
|Nikon D40X« »||4.9 in||3.7 in||2.5 in||18.4 oz||520||n||Mar 2007||729||Nikon D40X|
|Olympus XZ-2« »||4.4 in||2.6 in||1.9 in||12.2 oz||340||n||Sep 2012||599||Olympus XZ-2|
|Olympus E-PL2« »||4.5 in||2.8 in||1.7 in||12.8 oz||280||n||Jan 2011||599||Olympus E-PL2|
|Olympus E-PL3« »||4.3 in||2.5 in||1.5 in||11.0 oz||300||n||Jun 2011||599||Olympus E-PL3|
|Olympus E-PL1« »||4.5 in||2.8 in||1.7 in||11.8 oz||290||n||Feb 2010||599||Olympus E-PL1|
|Olympus E-620« »||5.1 in||3.7 in||2.4 in||18.4 oz||500||n||Feb 2009||699||Olympus E-620|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The Pentax Q was launched at a somewhat lower price (by 19 percent) than the 400D, which makes it more attractive for photographers on a tight budget. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon 400D features an APS-C sensor and the Pentax Q a 1/2.3-inch sensor. The sensor area in the Pentax Q is 91 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 5.6. The sensor in the 400D has a native 3:2 aspect ratio, while the one in the Pentax Q offers a 4:3 aspect.
Despite having a smaller sensor, the Pentax Q offers a higher resolution of 12 megapixels, compared with 10.1 MP of the 400D. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 1.53μm versus 5.71μm for the 400D). However, it should be noted that the Pentax Q is much more recent (by 4 years and 9 months) than the 400D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
The resolution advantage of the Pentax Q implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Pentax Q for good quality output (200 dots per inch) amounts to 20 x 15 inch or 50.8 x 38.1 cm, for very good quality (250 dpi) 16 x 12 inch or 40.6 x 30.5 cm, and for excellent quality (300 dpi) 13.3 x 10 inch or 33.9 x 25.4 cm. The corresponding values for the Canon 400D are 19.4 x 13 inch or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inch or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inch or 32.9 x 21.9 cm for excellent quality prints.
The Canon EOS 400D has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Pentax Q are ISO 125 to ISO 6400 (no boost).
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the 400D provides substantially higher image quality than the Pentax Q, with an overall score that is 15 points higher. This advantage is based on 1.9 bits higher color depth, 0.1 EV of lower dynamic range, and 1.8 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Canon 400D||APS-C||10.1||3888||2592||none||22.1||11.0||664||62||Canon 400D|
|Pentax Q||1/2.3||12.0||4000||3000||1080/30p||20.2||11.1||189||47||Pentax Q|
|Canon 750D||APS-C||24.0||6000||4000||1080/30p||22.7||12.0||919||71||Canon 750D|
|Canon 760D||APS-C||24.0||6000||4000||1080/30p||22.6||12.0||915||70||Canon 760D|
|Canon 650D||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||722||62||Canon 650D|
|Canon 1100D||APS-C||12.2||4272||2848||720/30p||21.9||11.0||755||62||Canon 1100D|
|Canon 550D||APS-C||17.9||5184||3456||1080/30p||22.1||11.5||784||66||Canon 550D|
|Canon 500D||APS-C||15.1||4752||3168||1080/20p||21.7||11.5||663||63||Canon 500D|
|Canon 450D||APS-C||12.2||4272||2848||none||21.9||10.8||692||61||Canon 450D|
|Canon 40D||APS-C||10.1||3888||2592||none||22.1||11.3||703||64||Canon 40D|
|Canon 350D||APS-C||8.0||3456||2304||none||21.8||10.8||637||60||Canon 350D|
|Nikon D40X||APS-C||10.0||3872||2592||none||22.4||11.4||516||63||Nikon D40X|
|Olympus XZ-2||1/1.7||11.8||3968||2976||1080/30p||20.4||11.3||216||49||Olympus XZ-2|
|Olympus E-PL2||Four Thirds||12.2||4032||3024||720/30p||21.4||10.2||573||55||Olympus E-PL2|
|Olympus E-PL3||Four Thirds||12.2||4032||3024||1080/60i||20.9||10.3||499||52||Olympus E-PL3|
|Olympus E-PL1||Four Thirds||12.2||4032||3024||720/30p||21.5||10.1||487||54||Olympus E-PL1|
|Olympus E-620||Four Thirds||12.2||4032||3024||none||21.3||10.3||536||55||Olympus E-620|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The Pentax Q indeed provides for movie recording, while the 400D does not. The highest resolution format that the Pentax Q can use is 1080/30p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the 400D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the Pentax Q relies on live view and the rear LCD for framing. That said, the Pentax Q can be equipped with an optional viewfinder – the O-VF1. The following table reports on some other key feature differences and similarities of the Canon 400D, the Pentax Q, and comparable cameras.
|Canon 400D||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Canon 400D|
|Pentax Q||optional||n||3.0||460||fixed||n||1/2000s||1.5||Y||Y||Pentax Q|
|Canon 750D||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon 750D|
|Canon 760D||optical||Y||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon 760D|
|Canon 650D||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon 650D|
|Canon 1100D||optical||n||2.7||230||fixed||n||1/4000s||3.0||Y||n||Canon 1100D|
|Canon 550D||optical||n||3.0||1040||fixed||n||1/4000s||3.7||Y||n||Canon 550D|
|Canon 500D||optical||n||3.0||920||fixed||n||1/4000s||3.4||Y||n||Canon 500D|
|Canon 450D||optical||n||3.0||230||fixed||n||1/4000s||3.5||Y||n||Canon 450D|
|Canon 40D||optical||Y||3.0||230||fixed||n||1/8000s||6.5||Y||n||Canon 40D|
|Canon 350D||optical||n||1.8||115||fixed||n||1/4000s||3.0||Y||n||Canon 350D|
|Nikon D40X||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Nikon D40X|
|Olympus XZ-2||optional||n||3.0||920||tilting||Y||1/2000s||5.0||Y||Y||Olympus XZ-2|
|Olympus E-PL2||optional||n||3.0||460||fixed||n||1/4000s||3.0||Y||Y||Olympus E-PL2|
|Olympus E-PL3||optional||n||3.0||460||tilting||n||1/4000s||5.5||n||Y||Olympus E-PL3|
|Olympus E-PL1||optional||n||2.7||230||fixed||n||1/2000s||3.0||Y||Y||Olympus E-PL1|
|Olympus E-620||optical||n||2.7||230||swivel||n||1/4000s||4.0||Y||Y||Olympus E-620|
One feature that differentiates the Pentax Q and the 400D is in-body image stabilization (IBIS). The Pentax Q reduces the risk of handshake-induced blur with all attached lenses, while the 400D has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.
The Pentax Q has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The 400D writes its imaging data to Compact Flash cards, while the Pentax Q uses SDXC cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon EOS 400D and Pentax Q and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 400D||Y||none||none||-||-||none||2.0||-||-||-||Canon 400D|
|Pentax Q||Y||mono||mono||-||-||mini||2.0||-||-||-||Pentax Q|
|Canon 750D||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Canon 750D|
|Canon 760D||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Canon 760D|
|Canon 650D||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon 650D|
|Canon 1100D||Y||stereo||mono||-||-||mini||2.0||-||-||-||Canon 1100D|
|Canon 550D||Y||stereo||none||Y||-||mini||2.0||-||-||-||Canon 550D|
|Canon 500D||Y||mono||mono||-||-||mini||2.0||-||-||-||Canon 500D|
|Canon 450D||Y||none||none||-||-||mini||2.0||-||-||-||Canon 450D|
|Canon 40D||Y||none||none||-||-||none||2.0||-||-||-||Canon 40D|
|Canon 350D||Y||none||none||-||-||none||2.0||-||-||-||Canon 350D|
|Nikon D40X||Y||none||none||-||-||none||2.0||-||-||-||Nikon D40X|
|Olympus XZ-2||Y||stereo||mono||-||-||mini||2.0||-||-||-||Olympus XZ-2|
|Olympus E-PL2||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-PL2|
|Olympus E-PL3||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-PL3|
|Olympus E-PL1||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-PL1|
|Olympus E-620||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-620|
Both the 400D and the Pentax Q have been discontinued, but can regularly be found used on eBay. The 400D was replaced by the Canon 450D, while the Pentax Q was followed by the Pentax Q10. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Pentax websites.
So what conclusions can be drawn? Is there a clear favorite between the Canon 400D and the Pentax Q? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Canon EOS 400D:
- Better image quality: Scores substantially higher (15 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.9 bits more color depth).
- Better low-light sensitivity: Requires less light for good images (1.8 stops ISO advantage).
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (3 vs 1.5 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (370 versus 230) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in August 2006).
Arguments in favor of the Pentax Q:
- More detail: Has more megapixels (12 vs 10.1MP), which boosts linear resolution by 7%.
- Broader imaging potential: Can capture not only stills but also 1080/30p video.
- Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (98x57mm vs 127x84mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 376g or 68 percent) and is thus easier to take along.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More affordable: Was released into a lower priced segment (19 percent cheaper at launch).
- More modern: Reflects 4 years and 9 months of technical progress since the 400D launch.
If the number of relative strengths (bullet points above) is taken as a guide, the Pentax Q emerges as the winner of the match-up (11 : 8 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Canon 400D and the Pentax Q place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the 400D or the Pentax Q perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.
Other camera comparisons
Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 400D vs Canon 5DS
- Canon 400D vs Canon SX530
- Canon 400D vs Fujifilm X100F
- Canon 400D vs Nikon 1 J5
- Canon 400D vs Nikon 1 V1
- Canon 400D vs Nikon D300S
- Canon 400D vs Panasonic LX5
- Canon G5 X Mark II vs Pentax Q
- Canon G9 X Mark II vs Pentax Q
- Canon M6 Mark II vs Pentax Q
- Hasselblad X1D II vs Pentax Q
- Olympus E-450 vs Pentax Q
Specifications: Canon 400D vs Pentax Q
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Canon 400D||Pentax Q|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Canon EF mount lenses||Pentax Q mount lenses|
|Launch Date||August 2006||June 2011|
|Launch Price||USD 799||USD 649|
|Sensor Specs||Canon 400D||Pentax Q|
|Sensor Format||APS-C Sensor||1/2.3" Sensor|
|Sensor Size||22.2 x 14.8 mm||6.17 x 4.55 mm|
|Sensor Area||328.56 mm2||28.0735 mm2|
|Sensor Diagonal||26.7 mm||7.7 mm|
|Sensor Resolution||10.1 Megapixels||12 Megapixels|
|Image Resolution||3888 x 2592 pixels||4000 x 3000 pixels|
|Pixel Pitch||5.71 μm||1.53 μm|
|Pixel Density||3.07 MP/cm2||42.74 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/30p Video|
|ISO Setting||100-1600 ISO||125-6400 ISO|
|DXO Sensor Quality (score)||62||47|
|DXO Color Depth (bits)||22.1||20.2|
|DXO Dynamic Range (EV)||11.0||11.1|
|DXO Low Light (ISO)||664||189|
|Screen Specs||Canon 400D||Pentax Q|
|Viewfinder Type||Optical viewfinder||Viewfinder optional|
|Viewfinder Field of View||95%|
|LCD Framing||Live View|
|Rear LCD Size||2.5 inch||3.0 inch|
|LCD Resolution||230k dots||460k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon 400D||Pentax Q|
|Autofocus System||Phase-detect AF||Contrast-detect AF|
|Continuous Shooting||3 shutter flaps/s||1.5 shutter flaps/s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||CF cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon 400D||Pentax Q|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 400D||Pentax Q|
|Battery Life (CIPA)||370 shots per charge||230 shots per charge|
127 x 84 x 65 mm
(5.0 x 3.3 x 2.6 in)
98 x 57 x 31 mm
(3.9 x 2.2 x 1.2 in)
|Camera Weight||556 g (19.6 oz)||180 g (6.3 oz)|
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